CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2001

  • question_answer
    Voltage and current in an AC circuit are given by\[V=5\sin \left( 100\pi t-\frac{\pi }{6} \right)\]and \[I=4\sin \left( 100\pi t+\frac{\pi }{6} \right)\]

    A)  voltage leads the current by\[30{}^\circ \]

    B)  current leads the voltage by\[30{}^\circ \]

    C)  current leads the voltage by\[60{}^\circ \]

    D)  voltage leads the current by\[60{}^\circ \]

    E)  current and voltage are in phase

    Correct Answer: C

    Solution :

    Net phase difference between current and voltage \[=\frac{\pi }{6}-\left( -\frac{\pi }{6} \right)=\frac{\pi }{3}=60{}^\circ \] Hence, current leads the voltage by\[60{}^\circ \].


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